<template>
    <el-container class="home_container">
        <!--头部区域-->
    <el-header>
        <div>
        <img src="../assets/heima.png" alt="">
        <span>电商后台管理系统</span>
        </div>
        <el-button type="info" @click="logout">退出</el-button>
    </el-header>
    <!--页面主体区域-->
    <el-container>
        <!--左侧边栏-->
        <el-aside :width="!isCollapse?'200px':'64px'">
            <div class="toggle-button" @click="toggleCollapse">展开>>||</div>
         <!--侧边栏菜单区域-->  
     <el-menu
      background-color="#333744"
      text-color="#fff"
      active-text-color="#409EFF"
      :unique-opened='true'
      :collapse='isCollapse'
      :collapse-transition='false'
      :router="true"
      :default-active='activePath'>
      <!--一级菜单-->
      <el-submenu :index="item.id+''"  v-for="item in menulist" :key="item.id">
          <!--一级菜单模板区域-->
        <template slot="title">
            <!--图标-->
          <i :class="iconsobj[item.id]"></i>
            <!--文本-->
          <span>{{item.authName}}</span>
        </template>
   

         <!--二级菜单-->   
        <el-menu-item  :index="'/'+subItem.path" 
         v-for="subItem in item.children"
          :key="subItem.id"
          @click="saveNavState('/'+subItem.path)">
         <!--二级菜单模板区域-->
        <template slot="title">
            <!--图标-->
          <i class="el-icon-menu"></i>
            <!--文本-->
          <span>{{subItem.authName}}</span>
        </template>
        </el-menu-item>

     </el-submenu>

     </el-menu>

        </el-aside>
        <!--右侧内容主体-->
        <el-main>
            <!--welcome --路由占位符-->
            <router-view></router-view>
        </el-main>
    </el-container>
    </el-container>

</template>
<script>
export default {
    //初始化数据区域
    data(){
    return{
        //左侧菜单数据
        menulist:[],
        //图标管理(id:图标)
        iconsobj:{
            '125':'iconfont icon-users',
            '103':'iconfont icon-tijikongjian',
            '101':'iconfont icon-shangpin',
            '102':'iconfont icon-danju',
            '145':'iconfont icon-baobiao'
            
        },
        //是否折叠
        isCollapse:false,
        activePath:''
    }
    },

//html渲染前初始化
created(){
    //获取菜单
    this.getMenuList();
    //获取点击保存的菜单
    this.activePath=window.sessionStorage.getItem('vue_shop_activePath');
},

 //普通方法区域   
 methods: {
     logout(){
     // 从 sessionStorage 删除保存的数据
     sessionStorage.removeItem('vue_shop_token');
     //定向到登录页面
     this.$router.push("/");
       this.$message({
             showClose: true,
              message: "请重新登录",
             type: 'warning'
              });
     },
     //获取菜单的方法
        async getMenuList(){
         const{data:res} =await this.$http.get('menus') 
         if(res.meta.status==200){
             this.menulist=res.data
             console.log(this.menulist)
         }else{
               return this.$message.error(res.meta.msg);
         }
        } ,
        toggleCollapse(){
               this.isCollapse=!this.isCollapse 
        },
        //保存菜单链接激活状态
        saveNavState(activePath){
             window.sessionStorage.setItem('vue_shop_activePath',activePath);
             this.activePath=activePath;
        }
 },
 

}

</script>
<style lang="less" scoped>

.home_container{
    height: 100%;
}
.el-header{
    background-color: #373d41;
    display: flex;
    justify-content: space-between;
    padding: 0;
    align-items:center;
    color: #ffffff;
    font-size: 20px;
    > div{
        display: flex;
        align-items: center;
        span{
            margin-left: 15px;
        }
    }
}
.el-aside{
    background-color: #333744;
}
.el-main{
    background-color: #EAEDF1;
}
.iconfont{
    margin-right: 10px;
}
.el-menu{
    border-right: none;
}
.toggle-button{
    background-color: rgb(83, 90, 90);
    font-size: 10px;
    line-height: 24px;
    color: #ffffff;
    text-align: center;
    letter-spacing: 0.3em;
    cursor: pointer;
}
</style>